A young man came to a doctor with complaints of pain in his heart, It turns out that he drinks up to 8 cups of coffee per day. What the effect of the caffeine contained in coffee on the human heart?

Answer options

1. Causes tachycardia, demand increases myocardial oxygen demand
2. Causes narrowing of coronary oxygen vessels
3. Slows down conduction in the heart the of heart
4. Decreases the force of contractions
5. Increases body temperature